There really isn't that much in the Gunks that will give you practice for the style of climbing you'll find in the Valley. Definitely shift your focus to the Daks. There's plenty there that will get you ready. Put your time into climbing cracks - all sizes and shapes.
Years ago Kevin Boyle (KB) posted a list of good crack climbs in the Daks on the old Gunks.com site. I used it as my training guide before going to Yosemite and it paid off beautifully. Here it is with some of my thoughts added to his list.
Ice Cave Mountain
Atwells Revenge (5.8, delightful, if short, pure hand crack)
Good Luck Cliff
Mystery Achievement (5.9; pure hand crack climbing, KB; full on jamming, sustained, FF)
Cleaveland (5.8; involves offwidths, FF)
Beer Walls
Seven Ounces (5.7)
Frosted Mug (5.9; awesome crack in corner, KB; #4 Camalot useful for opening moves, FF)
Live Free or Die (5.9+; face climb into the nice crack, KB)
Rockaholic (5.8; leaning crack, KB)
Clutch and Cruise (5.8+; main problem is the opening 12, a taller person might find it easy but I needed to stem feet high to jam out of alcove FF)
Creature Wall
Arachnid Traction (5.8; abrasive in spots, may want tape for this one, FF)
Giants Washbowl
Butterflies are Free (5.8; recommended link-up with Partition, KB; excellent combination, enjoyable hand crack on P1, FF)
Spiders Web
Dacker Cracker (5.10c)
TR (5.10a)
On the Loose (5.10a; THE steep crack of the grade, KB; good pro, very good jams FF)
Esthesia (5.10a; must like offwidth for this one, KB; wide jams, e.g. arm bar, through crux, FF)
Hurricane Crag
Forever Wild (5.10; sustained crack, KB)
Bark Eater Cliffs
Mr. Clean (5.8; layback, FF)
Because Dogs Can (5.8; hand crack, FF)
Fun Country (5.10a; hard to protect, FF)
Noonmark
Wiessner Route (5.8; sustained hand crack -offwidth-chimney-, FF)
Center Climb (5.7; 5.8 variation follows rhs crack, 5.9 (?) roof variation exits left via jam, FF)
Pitchoff Chimney Cliff
Rock and Roll Star (5.10c; crux crack to face climbing above, KB)
Wald-Calder (5.9; short, enjoyable jam section at top of second pitch, FF)
The Disputed (5.8; additional finger crack pitch when doing The El or Petes Farewell, FF)
Star Sailor (5.10c; nice finger crack, KB)
Cascade Lake Cliffs
My Favorite Martian (5.9;crack through low roof, KB; excellent pro, FF)
High Falls Crag
Route of Oppressive Power (5.10; one of the nicest cracks anywhere, KB)
Moss Cliff
Falconer (5.10+)
Fear of Flying (5.10)
Touch of Class (5.9+; enjoyable finger crack on P2, FF)
Hard Times (5.9+; unusual roof move to exit chimney, strenuous hand cracks to top, FF)
Poke-O-Moonshine
Great Dihedral (5.9+; very long crack in corner on P2, KB) Wild, fun move into it! FF
The Sting (5.8; pure hand crack for about 90, KB)
Gamesmanship (5.8; P1 parallels the Sting, KB; P4 hand crack is pure fun, FF)
Bloody Mary (5.9; layback crack on P2, KB)
P.T. Pillar (5.8; layback pitch, FF)
Cirrhosis (5.9+; P2 has nice 100 crack, KB)
Paralysis (5.8; crack on P2 for 100, KB)
Fastest Gun (5.10a; tons of crack on P1 and P2, KB; involves full range of crack climbing technique, layback or jam P1, finger crack on P2, FF)
Freedom Flight (5.10; P2 is pure crack in an awesome position, KB)
The Snatch (5.9 crack on P1 w/ anchor, 5.10 crack on P2 w/ anchor, KB)
Knights in Armor (5.10d; rap in from the Great Dihedral. One of the best cracks around, KB)
It Dont Come Easy (5.10d; P1 has lots of pure crack at 5.9+, fixed anchor above; P3 has great corner crack for 130, KB)