By Nathan Gomes and Allison Lampert (Reuters) -Gulfstream business jet maker General Dynamics Corp on Wednesday reported a third-quarter profit above analysts’ estimates, fueled by strong demand for flying private and for products and services at its Marine Systems division. The group benefited from demand for private jets in the United States and other regions, despite fears of a slowdown due to broader economic uncertainty. “Only time will tell about the macroeconomic impact, but we continue to see strong interest in Gulfstream aircraft and services,” General Dynamics Chief Executive Officer…