Research Triangle Park-based G1 Therapeutics (Nasdaq: GTHX) has closed its initial pubic offering, raising more than $108 million. “G1 Therapeutics received approximately $108.6 million in proceeds from the offering, net of underwriting discounts and commissions, but before estimated offering expenses,” the company announced Tuesday. The offering included close to 7.8 million shares of common stock priced at $15 per share, which the company said included just over 780,000 shares sold through…