I see several areas of concern. The gap isn't one of them, as drywall will span that without issue.

1. The bottom plates don't appear to be treated. In the modern era this is required in most jurisdictions.

2. The two end studs appear severely out of parallel. This suggests that one or both walls are out of plumb. I would put a level on both. Also check any doorways on both axes, where this would result in poor operation.

3. The end studs aren't connected. A block of some sort should be used mid-height to tie them so they don't move with respect to each other. This makes your drywall joint more stable. Given the gap, don't displace the studs to bring them together. Keep them plumb and straight.

I see several areas of concern. The gap isn't one of them, as drywall will span that without issue.

1. The bottom plates don't appear to be treated against decay (or isolated from the concrete). In the modern era this is required in most jurisdictions.

2. The two end studs appear severely out of parallel. This suggests that one or both walls are out of plumb. I would put a level on both. Also check any doorways on both axes, where this would result in poor operation.

3. The end studs aren't connected. A block of some sort should be used mid-height to tie them so they don't move with respect to each other. This makes your drywall joint more stable. Given the gap, don't displace the studs to bring them together. Keep them plumb and straight.