Final answer:
Gil-Dong, after showcasing his courage, took leadership of a robber band and orchestrated a successful raid on a wealthy Buddhist temple, subsequently planning another raid.
Step-by-step explanation:
The student's question 'What was Danglars planning to do with them?' appears to be incorrectly referencing the character of Gil-Dong rather than Danglars. Assuming that the question meant to inquire about Gil-Dong's plans, we can ascertain from the passage that Gil-Dong became the leader of a band of robbers and successfully planned the despoiling of a Buddhist temple.
The temple was previously a fortress of wealth and power, protected by its priests. Riding high on this accomplishment, Gil-Dong and his band enjoyed their riches before he planned a new raid to continue their string of successes.
In the given excerpt, Gil-Dong is planning to assist a band of robbers in despoiling a large and strong Buddhist temple. The temple is well patronized by officials who allow the lazy and licentious priests to collect tribute from the poor people. Gil-Dong's plan is to help the band accomplish their design and become their chief.