What Religion is this, and who is Saint George?

It's a Coptic Orthodox Christian Church. About St. George: https://oca.org/saints/lives/2016/04/23/101184-greatmartyr-victory-bearer-and-wonderworker-george

Coptic (i.e., Egyptian) Orthodox Christian Church. Check: http://stgeorgechurch.org/about-us/ & About Coptic church: http://stgeorgechurch.org/about-the-coptic-church/ St (saint) George is known as The Prince of Martyrs, is a third century Christian martyr who was a prince from a royal family in Today's Turkey (his father) and Palestine (his mother) endured torture because of his Christian faith for seven years, by 70 rulers! He is known in Coptic church that he responds very fast to who seeks his intercession (prayers) and help.

Religion; Christian Denomination; Orthodox St. George I recommend the above link..

Yes! I'm aware of what the cross means! Terrible death sentence though and cruel too.

Here is a short story about st. George which the church is named after. http://www.copticchurch.net/synaxarium/8_23.html Don't you know that the cross at the top of our church represents the belief in Jesus Christ? Please let us know if you would like to know more or attend the service.