Develop a musical piece by utilizing the alphabet-based notation of the selected musical form and the provided melodic idea.
X:1
L:1/8
Q:1/8=100
M:6/8
K:Gmin
['GGd =BBA G2 A =B2 d =BBG', 'G3 ddd d2 d f2 d c2', 'dcB BAG']  
X:1
L:1/8
Q:1/8=100
M:6/8
K:Gmin
 GGd =BBA | G2 A =B2 d | =BBG d2 =e | =B G2- G3 :| ddd d2 d | f2 d c2 d | A2 F G2 A | F D2- D3 :| 
 dcB BAG | ccB cdd | dcB BAG | ccBcde | dBG ecd | B G2- G3 :|  