Deities not mentioned have a presence that doesn't differ from most other surrounding nations.
A confluence of factors have resulted in Abadar having no significant presence in Galt. Between the disreputable end of the Golden Council, the layman's distaste for the wealthy, and the lack of commerce in Galt to draw Abadarans, the country has few followers of the Wealthy Father. The scandal that ended the Golden Council resulted in a law preventing Abadaran clergy from establishing financial institutions, and remains in effect today.
Alseta, viewed as the goddess of change and boundaries has developed a rather sizable cult over the course of the Red Revolution. Those seeking comfort from the tumultuous changes across the nation have sought her wisdom to find purpose in the chaos. There is a large statue to her in the city's main plaza on the Avenue Champs-Élysées
Asmodeans are persecuted with great zeal. While the Red Revolution has meant different things to different Revolutionary Councils, the original uprising was about removing the Chelaxians and their diabolism from Galt. This prejudice has remained constant across all of Galt's Councils and citizens. Any followers of Asmodeus left in Galt hide their faith compulsively, as being discovered would certainly result in a meeting with Margaery.
The attitudes of revolutionary Galt have given Calistirans the opportunity to preach their faith and greatly expand their ranks. High crime rates and anemic law enforcement have lead citizens to seek out those who would mete out justice for them. This need for revenge as well as a resurgence of the world's oldest profession in the capital have endeared the Savored String to the people of Isarn, converting droves of followers.
The city's infamous "La Lumière Rouge" cuts through the northern city, and within those boundaries, the Church operates with little government oversight. While she is still more popular than in most other nations, her presence is less pronounced in other villages and cities outside of Isarn.
Organized worship of Cayden Cailean was outlawed after the disaster that was the Cailean Council. The god's positive outlook and the clergy's willingness to look after the large amount of orphans has lead to relatively little enforcement of the ban. While there is no formal temple to the Accidental God, it's no secret that clerics will coincidentally meet up with other followers in taverns and sing his praises.
While Cayden Cailean has developed good will recently, the recent rise of the "Caydogs" (a thieves' guild worshiping The Lucky Drunk) has attracted attention from authorities. The group remains popular among the poor because of the guild's soup kitchens and orphanages. This popularity has prevented direct action against the Caydogs by the city guard.
While Erastil is worshiped similarly to other places in the Inner Sea, the major lack of structure in Isarn has united Old Deadeye's faithful. The followers of Erastil have formed a sizable insular community known as Le Commune.
Iomedae's presence in Galt is small, but her faithful worship freely. Much of her Church's infrastructure in Isarn was donated to the Third Crusade as Galt's constant revolutions were quickly eroding the church's resources.
Milani is the most divisive god in Galt. She has many followers owing to her revolutionary sentiment, but she is formally outlawed by the Revolutionary Council trying to hold power.
When the then-mortal Courage Heart refused to support the increasingly bloody revolution, she was executed. Milani tore her soul from the Final Blade and elevated her to the station of herald. Her death in 4672, fractured the follower of Milani into two groups:
The Blood Rose: The most militant of Milani's followers and devoted completely to the Revolution, and will make no compromises until they can find the perfect government. Despite the numerous governments that have come since the schism, they have yet to support a Revolutionary Council and continue to advocate for more revolution. Fully embracing the spirit of perpetual revolt, this group is based in Woodsedge with only a few skilled agents in Isarn to foment revolutionary sentiment.
The Courageous Council: This group lies dormant, waiting for a Revolutionary Council they believe would be worthy of Milani's blessing. While they've been active during various transitions of power, the Courageous Council tries to be judicious about any further revolution, hoping to avoid further bloodshed until a truly worthy cause comes to their attention
Finally, in 4692, with the ascension of the Galtcreed Pact, another schism occurred, fracturing The Courageous Council and forming the Sisters of the Everbloom.
Sisters of the Everbloom: After a period of rapid turnover in power, the Courageous Council played a part in the ascension of the Galtcreed Pact. Many of the Milanites were satisfied to finally have a government uninterested in using the Final Blades, and began pushing for the end of the Red Revolution. This new group, the Sisters of the Everbloom, preaches that the revolution has gone on entirely too long. There must be years of peace for Galt to heal and adjust before considering another new revolution. Because they advocate for the end to further revolts, the Sisters of the Everbloom run a hospital publicly without fear of the ban on Milani.
It's no secret that the regular upheavals in Galt have given worshipers of Norgorber many shadowy corners to hide in. In a city where death is cheap, Norgorbers's aspects, The Reaper of Reputation and Blackfingers, have ample demand for their craft. Worshipers of the the Grey Master find little organized resistance to their efforts. Despite all the rumors, paranoia, and assumed prominence of The God of Whispers' faithful, there remain no public signs of their machinations.
As the judge of souls, Pharasma is intrinsically opposed to the existence of the Final Blades. Pharasmins have made several attempts to destroy Final Blades. While it isn't known if destroying a Final Blade will release the souls or destroy them, it would certain prevent more from being captured. In light of this campaign of destruction against a symbol of the Revolution, Pharasma is banned with almost as much prejudice as Asmodeus.
Razmiran proselytizing is strictly forbidden, but the proximity to Razmiran and people's disillusionment has led to pockets of followers showing up throughout Galt.
The presence of the Final Blades and revolutionary fervor in Galt has warped the established cult of Sarenrae in Galt to match the violent realities of their lives. The Galtan Cult of the Cleansing Sun no longer focuses on healing and redemption, but instead is focused heavily on her swift punishment for the irredeemable, viewing the Final Blades as the perfect instrument of punishment. The Cult of the Cleansing Sun has been unanimously denounced by other leaders of the Sarenite faith.
The worshipers of the Everlight's traditional faith still have a presence in Galt, but there is no organized congregation.
Many of Shelyn's followers fled Isarn early in the Red Revolution when many of the museums and universities started being plundered. Shelynites gathered as much historic art as they could and tried to flee with it, sometimes paying with their lives. Partly because of the exodus and partly because few members of the city have the luxury of pursuing artistic endeavors, Shelyn's influence in Galt has waned significantly. Some followers remain to rediscover lose pieces of art.