Q.Bradford Pear trees
When is the best time to plant a bradford pear tree and will it be OK to plant now in southwest Georgia?

Fall would be the best planting time.
Here is a link with some of the best varieties for your region.
https://www.gardeningknowhow.com/edible/fruits/pear/types-of-pear-trees.htm
I would also encourage you to contact your local County Extension Office.
They are a valuable source for information on the best types of trees to grow in your region.
Here is a link to find your closest office location.