Without trying to offend.
Gary really isn't fully compos mentis is he? A 40(?) year old going to Disneyland wearing an Ursula t-shirt, a cupcake backpack and Mickey ears?
Sitting at lunch going "Horsey!" "Castle!" - it's like watching a bleeping toddler.
Originally, I thought he put on the "a bit silly and innocent gay man" but it's too convincing to be an act, so by deduction, Gary is actually that bleeping thick, or he isn't the full ticket. Normally, i'd take the "he's not hurting anyone, leave him alone, let him do what makes him happy" approach, but when it's at the expense of the tax payer, then I will call him what he is.
And why on earth Twattan, not only, associates himself with this man-child, but also picks up his bill, is beyond me, but then again, the only people that seem to like Adam are Gary and Brogan, so I guess he's desperate for any attention he can get, hence his pursuit of the Cheers Ears son, who is probably ignorant/innocent enough to enjoy the attention of a 'YouTube Celebrity'. Look out, we could see them on a trip to Orlando soon... be careful lad, Adam might try and make an unwanted advance like he did with that Sam kid.