Actually there is a way, look around for a odd/old looking gmail mobile signup page and just use it. (there is no captcha for it even)
Set the country you making the account with (USA if its a USA proxy) and when you get to the phone verify part (which is required) just set the country to where ever the phone/sim card is stated to be from. I used to use this and I could whip out gmail + yt channels in about 30 - 40 seconds a pop if my internet was fast.
Please note that this is only for the signup page I noted above, do not PM me nor beg me for the url, go find it yourself.