Yes, he is. It is written in the first section in the book of 2 Kings on the very first chapter. David was gay for Jonathan; however, Jonathan isn't gay. It totally explains why David have so many wives to fill his cup because his cup isn't enough for his ultimate love. His true love is Jonathan and Jonathan is just a straight dude. David with many wives is a substitution for Jonathan and it's no wonder why King David has sin so many times that he killed his own best friend in war.