"Have a gander" is a colloquial phrase that means to take a look or have a glance. If you're looking for synonyms for this phrase, there are plenty of options. Here are a few ideas:
- Take a peek.
- Cast an eye over.
- Check out.
- Glance at.
- Look over.
- Survey.
- Scrutinize.
- Eye up.
- Examine.
- Peruse.
- Study.
- View.
- Ogle.
- Watch.
Each of these phrases has a slightly different connotation, so choose the one that best fits the situation. For example, "ogle" suggests a more intense or prolonged look, while "glance at" is more casual and quick.