Strengths
Gemini (earth) and Virgo (air) see the world differently — one through practice, the other through ideas — and that can be enriching: curiosity, wit gives attentiveness, practicality ground to stand on, attentiveness, practicality gives curiosity, wit a fresh perspective.
What to watch for
Earth can find air inconsistent, and air can find earth too literal. If you're both willing to explain your reasoning instead of assuming it's obvious, understanding comes quickly.
Pair dynamic
You both adapt easily — rarely boring together, but it's worth making sure decisions actually get followed through, not just talked about.
Sun-sign compatibility is a general picture based on elements and modalities, not a precise forecast for specific people. Real relationships depend on far more than a birth date.