Athletics NZ said Gill was one of five athletes whose selection was pending, but who would be in limbo until July.
That has prompted Gill to switch his focus from London to the world junior championships at Barcelona, a fortnight before the Olympics.
"It makes sense to concentrate on the one I have been named for," he said. "They're the first so they're at the forefront of my mind. I'm up against the Polish guy, Krzysztof Brzozowski, who beat me last time at the world youth Olympics.
"He's the only guy who has beaten me in a competition in my career, so I really want to beat him."
The junior shot is lighter, which means a balancing act between speed and strength training.
Gill yesterday collected the $15,000 grant for the Westpac emerging talent award at the Halberg Awards.
"I don't have a normal day job," he said, "so this will help a lot."