Final answer:
The Highland Scots in Georgia were soldiers invited by James Oglethorpe to defend the colony against the Spanish, contributing significantly to Georgia's military and cultural development.
Step-by-step explanation:
The impact of the Highland Scots on the colony of Georgia was significant as they were soldiers whom James Oglethorpe invited to come and fight the Spanish. Oglethorpe and the Trustees promoted Georgia as a military buffer between the Carolinas and Spanish-held Florida, and their plans included utilizing the colonists as a militia force against external threats. Besides contributing to the military defense of the colony, the Highland Scots and other groups like the Salzburgers, who arrived as religious refugees, helped shape the cultural and economic landscape of Georgia.