The flag for Guam, which may show as the letters GU on some platforms.
The Flag: Guam emoji is a flag sequence combining ? Regional Indicator Symbol Letter G and ? Regional Indicator Symbol Letter U. These display as a single emoji on supported platforms.
Flag: Guam was added to Emoji 1.0 in 2015.
U+1F1EC
U+1F1FA
?? Regional indicator symbol letter g
?? Regional indicator symbol letter u