hi,

see ace academy or made easy both has study courses for graduate aptitude test in engineering and engineering services exams, however there is many exams conducts by state wise recruitment board or different organization like power grid, NLC, coal india every year for recruitment of management trainee or engineers. now gate or ese syllabus is standard to prepare for any engineering services exams, but the questions would be quite different. if you analyze the questions gate questions are very much conceptual and have more number of numerical questions. so for  Maharashtra Engineering Services exam you also need to study the theory papers. so just go through the previous years papers and make decision., but if you prepare for gate exam you would find quite strong concept and it would help you for other all india or state level exam preparation.