Yes, Graduate Management Admission Test (GMAT) is conducts online .

GMAT Exam Pattern:
GMAT Test Section:
# of Questions:
Question Types :
Timing:

Analytical Writing Assessment
1 Topic
Analysis of Argument
30 Minutes

Integrated Reasoning
12 Questions
Multi-Source Reasoning
Graphics Interpretation
Two-Part Analysis
Table Analysis

30 Minutes
Quantitative
37
Questions Data Sufficiency
Problem Solving
75 Minutes

Verbal
41 Questions
Reading Comprehension
Critical Reasoning
Sentence Correction
75 Minutes

GMAT Syllabus

GMAT Quantitative / Maths Syllabus

Following are some of the topics expected in the quantitative section:
Maths Formulas List
Integers
Decimals
Fractions
Number properties
Order of operations
Percentage
Ratio and proportion
Profit and loss
Simple and compound interest
Speed, distance and time
Permutation & combination
Linear equations
Quadratic equations
Sets
Statistics: Average, Median, Mode, Range, Standard deviation
Powers and roots
Probability
Pipes, cisterns, work, time
Lines and angles
Triangles
Polygon
Quadrilateral
Circles
Co-ordinate geometry
Volume and surface area

GMAT Verbal / Grammar Syllabus

Following are some of the topics expected in the GMAT verbal section.
They generally revolve around basic grammar rules.
Basic Sentence structure: Nouns, Pronouns, Adjectives
Verb Tense
Idioms & Idiomatic Expressions
Pronoun Agreement
Subject Verb Agreement
Modifiers
Parallelism