Gorman and Ryan have both opted not to continue their work at Loftus Road until Magilton's situation is resolved, and Gallen was tempted to follow them until his loyalty to the club kicked in.
When asked by BBC Radio 5 Live if he had to think hard about responding to the club's request to take over he said: "Yes I did. The truth is I have been an QPR a long time as a coach. I was there as a player, but I've been there 13 seasons. I've been there a long time.
"Jim Magilton, I like him a lot. The manager and John Gorman have been brilliant to me and Keith Ryan is a personal friend of mine. It was in my mind (to leave) but I work for QPR and I will support QPR. I want to do well."
Gallen also said he "did not know the full facts" about what had happened with Magilton, but added that the club's players were "disappointed" by the situation.