2♦ GFR
After a one in a suit Opening the immediate Response of 2♦ shows any hand with 13+ points (or 11-12 pts and ≤ 7 losers) and is forcing to Game.

All following bids are natural. A jump to Game is weaker (13-15 pts) than a raise to the 3-level (16+ pts).

1♠ - 2♦ - 2♥ - 4♠ = 13-15 pts       1♠ - 2♦ - 2♥ - 3♠ = 16+ pts

2♣ GTR
After a one in a suit Opening : 2♣ is a Game Try Response : it shows 11-12 points (or 10 pts and 8 losers).

When 2♣ is bid immediately it denies holding a 4-card major suit.

If Responder can bid a 4-card major at 1-level, he bids this first, then bids 2♣ next.

Opener's rebid after 2♣ → 2♦ = 11-13 pts. All other rebids = 14+ pts

1♠ → 2♥ GTR : shows 5 hearts and 10-12 points.

Other Game Try Responses
It can occur that Responder (having bid his major suit first) is unable to bid 2♣ at his 2nd turn. This occurs when Opener rebids at the 2-level.
In such case Responder's Game Try Response, showing 10-12 points is

a bid of 2NT

a bid of the fourth suit where Fourth Suit is Forcing

an Invitation bid of a suit at the 3-level

Weak Responses
Suit raise Responses all show 6-10 points

single raise : 1♥ - 2♥ = 6-10 pts, 3-card trump support.

jump raise  : 1♥ - 3♥ = 6-10 pts, 4+ trumps, 8 losers, no singleton or void

Game raise : 1♥ - 4♥ = 6-10 pts, 4+ trumps, with singleton or void

New suit Responses of :

→ 1♦ = 6-10 pts, 4+card suit

→ 1♥ or 1♠ = 6-12 pts, 4+card suit.
                      Points reduce to 6-10 pts if Responder does not make a GTR next.

→ 1NT = 6-10 pts, no 4-card major

→ 2NT = 6-10 HCP, 5+5+ in the minor suits

Jump Shift Responses

1♣ or 1♦ → 2♥ or 2♠ = 6-10 HCP, 6-card suit

1♥ → 2♠ = 6-10 HCP, 6-card suit

1♥ or 1♠ → 3♣ or 3♦ = 6-10 HCP, 7+card suit