Yes, with hub centric rings
Same 5x110 PCD, but the centre bore of the wheels from Jeep Commander (71.6 mm) is larger than the hub of Pontiac Solstice (65.1 mm): you need 4 hub centric rings 71.6 → 65.1.
Rings 71.6 → 65.1
≈: width estimated from the original tyre size.
Wheel by wheel: offset and tyres
Each original wheel from Jeep Commander is compared with the one from Pontiac Solstice of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.
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≈7.5Jx18 ET40 · 235/55R18 — Fits like the original
Compared with the original ≈7.5Jx18 ET45 on Pontiac Solstice: shock absorber side −5 mm, wheel arch side +5 mm, tyre diameter +5.6 % : fit it with the original tyre size of Pontiac Solstice (245/45R18), not that of Jeep Commander.
Comparison for guidance only (estimated width). Check in detail
Before fitting the wheels
An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of Pontiac Solstice (M12x1.50), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.
And the other way round: wheels from Pontiac Solstice on Jeep Commander?