MacTech Guam
962 Pale San Vitores Rd, Tumon, 96913
671-477-6373
https://mactechguam.com/
Tropical T-Shirts
1088 W Marine Corps Dr, Dededo, 96929
671-637-0362
https://www.facebook.com/TropicalTshirts/
American Music
562 27, #122, Dededo, 96929
671-647-6895
https://americanmusicguam.com/
Guam also has a very rich original artist music scene, keep an eye on it to see if a local is dropping a new album.
https://www.reddit.com/r/GuamMusicScene/